Thom Stacey A, Hoit Jeannette D, Hixon Thomas J, Smith Alice E
Department of Speech, Language, and Hearing Sciences, University of Arizona, Tucson, Arizona 85721, USA.
Cleft Palate Craniofac J. 2006 Sep;43(5):539-46. doi: 10.1597/05-113.
To determine the age at which infants achieve velopharyngeal closure during vocalization.
Longitudinal with repeated measures.
Laboratory.
Six healthy infants were studied monthly from ages 2 to 6 months while they interacted with a parent and an investigator.
The presence or absence of velopharyngeal closure, as determined by sensing ram pressure at the anterior nares.
The velopharynx was open for windups, whimpers, and laughs, and it was closed for cries, screams, and raspberries, regardless of age. The frequency with which the velopharynx closed during syllable utterances increased significantly with age.
Velopharyngeal closure for speech-like utterance increases with age, but is not complete and is still undergoing development at 6 months of age. Velopharyngeal closure during infancy may be influenced by pressure demands of the utterance; however, support for this speculation is stronger for other types of utterances than it is for speech-like utterances. The method used in this study holds promise for evaluating infants with suspected velopharyngeal impairment.
确定婴儿在发声时实现腭咽闭合的年龄。
纵向重复测量研究。
实验室。
六名健康婴儿，从2个月至6个月大时每月进行研究，期间他们与一名家长和一名研究人员互动。
通过在前鼻孔处感知气流压力来确定腭咽闭合的有无。
无论年龄大小，腭咽在吸气、呜咽和大笑时是开放的，而在哭泣、尖叫和发出咂舌声时是闭合的。在发出音节时腭咽闭合的频率随年龄显著增加。
类似语音发声时的腭咽闭合随年龄增加，但在6个月大时并不完全，仍在发育中。婴儿期的腭咽闭合可能受发声压力需求的影响；然而，对于这种推测，其他类型发声的支持比类似语音发声的支持更强。本研究中使用的方法有望用于评估疑似腭咽功能障碍的婴儿。
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